Phase 1 & 2: Authentication and Children Management

Completed Features:
- Full JWT authentication system with refresh tokens
- User registration and login with device fingerprinting
- Child profile CRUD operations with permission-based access
- Family management with roles and permissions
- Database migrations for core auth and family structure
- Comprehensive test coverage (37 unit + E2E tests)

Tech Stack:
- NestJS backend with TypeORM
- PostgreSQL database
- JWT authentication with Passport
- bcrypt password hashing
- Docker Compose for infrastructure

🤖 Generated with Claude Code

maternal-app-backend/src/database/entities/user.entity.ts

@@ -0,0 +1,66 @@
+import {
+  Entity,
+  Column,
+  PrimaryColumn,
+  CreateDateColumn,
+  UpdateDateColumn,
+  OneToMany,
+  BeforeInsert,
+} from 'typeorm';
+import { DeviceRegistry } from './device-registry.entity';
+import { FamilyMember } from './family-member.entity';
+
+@Entity('users')
+export class User {
+  @PrimaryColumn({ length: 20 })
+  id: string;
+
+  @Column({ length: 255, unique: true })
+  email: string;
+
+  @Column({ length: 20, nullable: true })
+  phone?: string;
+
+  @Column({ name: 'password_hash', length: 255 })
+  passwordHash: string;
+
+  @Column({ length: 100 })
+  name: string;
+
+  @Column({ length: 10, default: 'en-US' })
+  locale: string;
+
+  @Column({ length: 50, default: 'UTC' })
+  timezone: string;
+
+  @Column({ name: 'email_verified', default: false })
+  emailVerified: boolean;
+
+  @CreateDateColumn({ name: 'created_at' })
+  createdAt: Date;
+
+  @UpdateDateColumn({ name: 'updated_at' })
+  updatedAt: Date;
+
+  @OneToMany(() => DeviceRegistry, (device) => device.user)
+  devices: DeviceRegistry[];
+
+  @OneToMany(() => FamilyMember, (familyMember) => familyMember.user)
+  familyMemberships: FamilyMember[];
+
+  @BeforeInsert()
+  generateId() {
+    if (!this.id) {
+      this.id = `usr_${this.generateNanoId()}`;
+    }
+  }
+
+  private generateNanoId(): string {
+    const chars = 'abcdefghijklmnopqrstuvwxyz0123456789';
+    let result = '';
+    for (let i = 0; i < 12; i++) {
+      result += chars.charAt(Math.floor(Math.random() * chars.length));
+    }
+    return result;
+  }
+}